Exhaust-nozzle



No. 624,062. Patented May 2, I899.

I W. MATTEWS &. G. ANDRICHT.

EXHAUST NOZZLE.

(Applicnticn filed Nov. 4, 1898.)

(No Model.)

UNITED STATES PATENT OFFICE.

\VILLIAM MATTEXVS AND GEORGE ANDRIOHT, OF MILWAUKEE, \VISOONSIN.

EXHAUST-NOZZLE.

SPECIFICATION forming part of Letters Patent No. 624,062, dated May 2,1899.

' Application filed November 4, 1898. Serial No. 695,447. (No model.)

To all whom, it may concern:

Be it known that we, WILLIAM MATrEws and GEORGE ANDRIOHT, citizens ofthe United States, and residents of Milwaukee, in the county ofMilwaukee and State of \Visconsin, have invented certain new and usefulI1nprovements in Exhaust-Nozzles; and we do hereby declare that thefollowing is a full,

clear, and. exact description thereof.

Our invention has for its object to prevent noisy exhaust ofgas-engines; and it consists in certain peculiarities of constructionand combination of parts constituting the exhaust-nozzle hereinafterparticularly set forth with reference to the accompanying drawing andsubsequently claimed.

The drawing. illustrates a lengthwise view of our exhaust-nozzle partlybroken away.

Referring by letter to the drawing, A indicates the exhaust-pipe of anordinary gasengine, and B a cylindrical shell that is open at both ends,the inner one of the latter being in screw-thread connection with saidpipe.

Rigidly secured to spacin g-bracl ets Z), made fast to the inside ofshell B, is a cone 0, having its point opposing outlet end of pipe Aclose to the latter on the same line of center. Inverse to cone 0, at apredetermined distance therefrom, is a hollow truncated cone D, havingits edge of greatest diameter provided with ears 0, made fast to theaforesaid shell. A short shell A and single pair of cones in thearrangement specified may serve as an exhaust-nozzle for an engine ofsmall capacity; but for higher-capacity engines we propose toindefinitely increase the length of shell and multiply the conestherein. Therefore we have shown another pair of cones O D, succeedingthose aforesaid. The cone 0 is rigid with spacing-brackets I), made fastto the inside of shell B in position to have the point of the lattercone oppose the outer end of cone D aforesaid close to the latter on thesame line of center. The cone D is similar to cone D and in the samearrangement with respect to cone C as the cone D is to primary cone 0 ofthe series, the ears 0, extending from the edge of greatest diameterpertaining to said cone D, being made fast to said shell.

It will be seen that the greatest area of cone 0 or O is less than thatof the shell-bore in transverse section, but that the greatest area ofthe truncated cone D or D is equal to said area of the shell-bore.

In practice products of combustion generated in a gas-engine haveforcible emission through pipe A into shell B and are diffused by coneC, the air ahead of said products being-gradu ally compressed byconvergence of the latter in truncated cone D on the way to exit. Theimmediate diffusion and succeeding convergence of the forcible productsof combustion prevent sudden shock that would otherwise come upon theair to produce the noisy sound commonly experienced in the use ofgas-engines, and in order to prevent back pressure of air the diffusionand convergence of said products may be indefinitely multiplied on theirway to exit by a succession of cones arranged as herein specified, theforce of the aforesaid products being gradually diminished as the exitis approached.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

An exhaust-nozzle for a gas-engine,the same comprising a cylindricalshell open at both ends, cones having their greatest diameter less thanthe shell-bore within which they are suspended to have their pointstoward the shell-inlet, and hollow truncated cones having their greatestdiameters equal to that of said shell-bore in which they are supportedinverse to the former cones alternate therewith.

In testimony that we claim the foregoing we have hereunto set our hands,at Milwaukee,

in the county of Milwaukee and State of YVisconsin, in the presence oftwo witnesses.

XVM. MATTEWS. GEORGE ANDRICHT.

\Vitnesses:

N. E. OLIPHANT, H. H. MEIXsEA.

